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A. S. DENNIS. COMBINED TYPE WRITER AND CALCULATING MACHINE. APPLICAT|0N-F|LED Nov. 2. 19ml A. SA DENNIS COMBINED TYPE WRITER AND CALCUL/UNG MACHINE.

APPLICATION FILED NOV. 2.1915.

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A. S. DENNiS COMBINED TYPE WRIER AND CALCULATING MACHINE.

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Patented July 8, 1919.

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To (d whom 'may concern lie it known that l, Abonnees S. Dennis, a citizen ot the `United rStates, residii'ig` at Cleveland, in the county of Cuyahoga and State oit hio, have invented a certain new and useful improvement in Combined Typelllriters and Calculating-hlachines, of which the tollowinp, is a full, clear, and exact description, reference being had to the accompanyinpf drawings.

This invention ,relates tota combined typewriter and calculating machine, and it has for its vgeneral object the production et a combination of this character wherein the typewriter may be used entirely independently ot the calculatingmachine, and riceversa; and when desired, and with slight exertion on the part. of the operator, the two machines be operatively coupled together for joint s' l; so that while a series or column of numbers is being written by the typewriter, the sum of such numbers is being accumulated by the calculating machine.

A further object of the invention is the provision ot a common base, wher-ecn the calculating machine is preferably permanently mounted, and by which the typewriter may be removably supported,said base carrying or containing" the transmitting; mechanism through which the two machines cooperate. (lne purpose of this construction is to allow the typewriter to be withdrawn from the combination by merely lifting it otli the base, if, in peculiar cases, it should be found more convenient to use the typewriter removed from the calculating machine, although'it should be borne in mind that its connection with the calculating machine' does not, in any way, interfere with its ordinary use. To this end the transmitting mechanism is so constructed and arranged that the mere placing of the typewriter upon the base renders the combination in readiness for joint work. y

The invention further provides for eX treme simplicity in the adaptation of a typewriter of standard design and construction to the combination; and it may be explained in this connection that, in the embodiment of my invention herein shown and described, I have employed a model of what is known as the li. t. Smith typewriter; and the calculatingl machine of the present combination embraces all the essentialsof the calculating peciacation ci Letters Patent,

Patented diniy d,

Serial No. 58,238.

machine disclosed in my application for United States Letters latent, Serial Number 51,302, led September 18, 1915. There fore in the drawings and throughout the following description l will go no further into detail in showing' and describing those parts which constitute no part of my present invention than is deemed necessary to give a clear understanding" to the case at hand.

@ther objects eomprehended by my invention are the provision ot means for automatically clearing or returning to Zero or normal position the indicating wheels of the counter and computing head of the calculating machine; and the provision of novel escapement and control mechanism for the calculatingmachine carriage.

in addition to the foregoing, other more specific objects will become apparent as this description proceeds, and to the attainment of these ends my invention may be defined as consisting of the combinations of clements set forth in the claims annexed hereto and illustrated in the accompanyingA drawings which form a part hereoiB and wherein similar reference characters are used to designate corresponding parts throughout the several views.

D mi@ ings.

ln'the drawings, Figure 1 is a plan view of the combined typewriter and calculating machine; Fig'. Q is a sectional rear elevation of the machine; Figb 3 is a sectional plan taken approximately on the line 3-3 of Fig. 2; Figs. l and 5 are vertical sectional views, from front to rear, on the line 4--5 of Fig. 3, the former being taken as looking toward the right and the latter', 'as looking toward the left hand end of the machine; Fig. (3, 7, 8, 9 and 10 are similar views on the correspondingly numbered lines of Fig. 3, the Various views being taken as looking in the direction indicated by the arrows of their' respective section lines; Figs. 11, 12 and 13 are sectional details on the lines 11-11, 12-12 and 213-13, respectively, of Fig. 3; Fig. 1l is a plan View of mechanism actuated by the typewriter keys. Jfor operating the keys of the calculating machine; Fig"a 15 is a section through the typewriter end of the machine, as indicated by the line 15-15 ot Fig. 3; Fig. 1G is a horizontal sectional vicw through the calculating machine, immediately below the manual and the callli@ culating head thereof, as indicated by the line 16-16 of Figs. 1 and 7, the viewbeing taken as looking upward; Fig. 17 is a vertical section, transverse of the upper and lower key banks of the calculating machine, on the line 1?' 17 of Fig. 7; Figs. 18, 19 and 20 are details of mechanism for automatically imparting either a transverse movement, to the typewriter carriage, or a rotary movement to the top thereof, from the operating part of the calculating machine, the iirst of said iigures being taken on the line 181S of Figs. 5 and 19; Fig. 21 is a sectional detail of the main clutch; Fig. 22, a detail of the mechanism for making and breaking the. operative connection between the typewriter and the calculating machine; Fig. 23 is a perspective view showing the relation between the release and repeat keys of the calculating machine, and mechanism operated thereby; Fig. 211 is a fragmentary.

section through the calculating machine adjacent the carriage release key; Figs. 25 and 26 are a fragmentary plan and front elevation, respectively, of the escapement mechanism of the calculating machine carriage; Figs. 27, 28 and 29 are perspective views, respectively, ofthe repeat, release and clear keys of the calculating machine; Fig. 30 is a similar view of arocking frame associated with the escapment mechanism of the typewriter; Fig. 31 is a sectional detail on the correspondingly numbered line of Fig. 5; Fig. 32 is a sect-ion on the vline 32-32 of Fig. T, and shows the mechanism through which the step-by-step movements of the calculating machine carriage are transmitted to the actuating finger of the counter; Fig. 33 is a detail of the change key actuated mechanism, whereby the calculating machine is caused either to add or multiply, or to divide or subtract; and Fig. 3a is a section on the line Selt of Fig. 33.

The frame. (Reference numerals 1 to 17.)

The base plate 1 of the machine (Figs. 2 and et to 10) may comprise an integral casting having a depending peripheral flange, or it may be built up, as shown in the drawings, of a plate to which the numeral 1 is applied, and to the underneath side of which is secured, adjacent itsY edges, angle bars 2. rlhe base plate is supported by. four legs 3, one of which is located at each corner of the plate, inside the angle bars 2, and the lower end of each leg is provided with a cushion 4, preferably of soft rubber, which may be attached to the leg by having its upper end inserted into a socket formed .in the bottom of the leg.

Suspended from the underneath side of' the base plate 1, (Figs. 2, si to 10, 1st 15) and extending from end to end thereof, and from its rear edge beyond its transverse center, is a rectangular. shallow easing, shown in plan in Fig. 1-l-. and comprising a bottom (i. end walls T and S, and a middle wall 9 (see Fig. 2).

Four posts 10 (Figs. 2 and 10) rise from the left hand end of the base plate (for the purpose of this description, it being assumed that the machine is viewed from the front when making reference to the right or left. hand ends ot' the machine) and are arranged to supportl the typewriter above, and properly locate it with respect to the mechanism wherewith it is intended to coperate. The. upper ends of the posts 10 may be recessed for the reception of the feet of the typewriter.

Rising from the end of the base plate remote from that over which thc typewriter is adapted to stand, is the right hand end plate 15 (Fig. 3) of the calculating machine; and the left hand end plate 16 thereof rises from the base plate a little to the right of the right hand pair of posts 10, or at about the longitudinal center of the base plate. Parallel to and located between the plates 15 and 16, is what will be referred to as the intermediate plate 17, said plate being situated somewhat nearer the plate 16 than the plate 15.

rl`he foregoing are the main parts of the frame of the machine, andthe subsidiary parts, such as backets and the like, will be included when the parts are described wherewith they are associated.

Description of drin/ity ancczcmz'am.

(Introducing parts 2O to 5G.

Journaled within a sleeve or boss 2O which rises from the base plate l, between the left hand end plate 1G and the intermediate plate 17. is the elongated hub 21 of a bevel gear (see Fig. rlie gear 22 is keyed` or otherwise secured, to the vertically disposed shaft 2?) that passes `downward through the bottom 6 of the previously described casing 5, and said shaft may be driven by any suitable means, such as a motor (not shown). lt/ieshing with the bevel gear 22, is a similar gear 2d (see Figs. 3 and 4) that is fastened to a shaft 25, journaled in the plates 1G and 17, and projecuing some dist-ance beyond the left hand side of the former. adjacent the plate 17, the shaft 25 has secured to it a .spur gear 26 that meshes with a larger gear 3 and 8). The last mentioned gear is rotatably supported upon the end of a shaft 311, but is not permitted to move longitudinally of the same. Such connection may be made in any well known manner. The circular face of the hub of .the gear 33 is serrated to form the face of one member of a dental clutch, the other member 36 thereof constituting a sleeve having a complementary face and splined to the shaft 31. The end of the member 36 opposite its clutch face, is provided with a groove 37 into which projects, at diametrically opposite points, the trunnion of a shifting fork 38 that is fastened to a shaft 39 (see Fig. 2:2). The shaft 39 is supported a slight dist-ance above the base platel, in brackets 40, and to the forward end of the shaft there is applied an operatingr handle 41, whereby said shaft may be oscillated to rock the fork 38 and .shift into and out of mesh with the other member, the member 3G of the clutch.

The shaft 3% is journaled in brackets 4:5 and L1G (Figs. '2, 3, 9 and 19), the former being located adjacent the clutch 36, and the latter, near the left hand end of the machine. 'The brackets yl5 and 4:6 may be securely fastened to the base plate by means 'of screws l15 and 16a, respectively.

`naled in the end walls 7 and 8 of the casing 5,' and which pass through the middle wall 9. All the shafts 50 are geared together through the pinions 51 that are secured to the respective shafts and are located just inside the aforesaid end wall 8.

It will be explained briefly at this time, and more fully hereinafter. that the shafts 50 are divided intern'iediate their ends, and the abutting` ends of the sections of each shaft are held in alinement and adapted to be operatively connected by a clutch, designated generally by the reference numeral The shafts are supported adjacent said clutches b v brackets 53 that' rise from the bottom wall 6 of the casing 5. For convenience' of description, the sections of the shaft to the right of the clutches (see Fig. 1,4) will be referred to as the shafts 50a.

While the machine is in use, the shafts 23, and 28 are constantly driven, as is also the shaft 3l, provided 'the member 36 of the previously mentioned dental clutch is in effective position. The various subinechanisms of the machine are driven from one or `the other of the aforesaid shafts upon the actuation of the clutches through which such mechanisms are operatively connected to theiri respective driving shafts.

The gear 47 is adapted to be operatively 51 is controlled by a latch arm 55, pivoted to a bracket 56 that rises from the bottom wallG of the casing 5. The parts which coperate with the latch arm to release the clutch 51 will be described farther along. Rack restoring mechanism.

(Introducing parts 60 to 78.)

Supported rigidly by and between the.

right hand end plate 15 and the intermediate plate 17 of the calculating machine` is a beam (30, having flattened front Vand rear sides and curved upper and lower sides. as shown in Figs. G and 7. The latter sides of the beam are provided with a series of transverse grooves. Guided upon each end of the beam 60., and also between rollers 61 which are carried upon studs 62, that project inwardly from the respective right hand end plate 15 and the intermediate plate 17, is a rack restoring frame which comprises two end plates G3, that are slotted at Gl: and the edges of the plates which define the sides of said slots are guided in grooves in the upper and lower sides of the beam 60. The corresponding ends of the aforesaid platee 63 are connected by tie rods (35 and 6G. The forward ends ofthe side plates 63 have upwardly and downwardly extending enlargements or wings 67 and 68, respectively. and each of these wings 87 and 68, carries a rack on its surface that is adjacent the respective end or intermediate plate of the machine, the upper and lower racks being shown, respectively, at G9 and 70, in Fig. 6. It will be noted from an inspection of said figure. that the racks are of peculiar formation and that each is arranged to coperate with a 1nutilated gear 71 that is secured tothe end of a shaft 7 2 which is journaled in the right hand end plate 15 and the intermediate plate 17 through the latter of which said shaft projects and beyond which it is provided with a gear 73 (see Fig. Ll) that has two smooth spots 74 and '75 for cooperation with the smooth portions 76 and 77 of a mutilated gear 78 which is carried by the casingof the main clutch, shown in detail in Fig. '21.

The mtl-n. clutch. i

(Fig. 21, parts 8O to 93.)

The clutch just referred tois indicated generally at 80, and is mounted upon the shaft 25 adjacent the intermediate plate 17. The casingof the clutch comprises a cylindrical wall 81, the ends of which are closed by the circular walls 8:2. Between the ends or circular walls of the casing, the shaft :25

has secured to it a ratchet' 83 with the teeth whereof is adapted to coperate the nose of lie dce-crilied` is a I ivliicli i t L to tlie aforesaid arni 80 anc nier encL anchored to tlie intermedia plate 1T, it 02, firing said paivl upon pivot and reinove its nose troni tlie teetli o tlie ratchet S3, tlie projection 88 engagii tlie tail. of 'tlie gavin tlirongli tlie slot 03 tlie cylindrical v: ll ot 'die clutcli casing.

Frein the foregoing' description it will seen that, ivlien tlie slriizt 9 is oscillated in tlie direction indicated oy t -e arrovv in lig. 21, tlie projection will be aivl Si, alloivin nioied freni the of tlie i paivi upon it iose oiL tlie pawi 'tlie spring 86 to roc saipivot S5 and to project tlie i into engagement viitli one o ie teetli of tlie ra'tcliet as a result o "vill ce locked to tlie rotating allait n and said clutch7 Witli its gear 7S, will lie driven in a direction indicated by arrows in ng Kiinaely tne was. l and 21. Buri st quarter turn of tlie rear 78, *lie gear 73 ll be given onefnalf a rotation, when tlie 76 Yof tlie C, "l Will pass over tlie siiiootli portion Tl ot tlie gear 73. Thereafter, tlie next tootlied portions of tlie gears 78 and Will niesli and another naliE rotation will be iinparted to tlie gear 73. rlie intermittent inoveinent tliiis imparted to to n'liieli tlie gears 73 and 71 are attached, will ause tlie mutilated gear 71 to rotate in like inannei' and n'iove tlie rack restoring" ranie toward tlie rear of tlie iiiacliine, and, after a slight dwell there, return it to normal `position.

All of tlie clutclies employed in tlie niacliine, including the one designated 5&1 already mentioned (and excepting the dental clutch, previously described) are substantially tlie saine as the inain clutch just described, so that in referring to tlie remaining cliii'ielies, tliey will be referred to only in a general way and by a single reference nunierai.

ir t

sinootli portion ine siart 2,

lwciaf/iicu Comi/rol for ill@ (actuating mec/laiii'smof Hi@ Mimo/fing lweee/LS. (introducing parts 100 to 121.)

n practically every respect, tlie indicating ivlieels, and the nieclianisni ivliereoy they are driven, tlie carriage iviiereon fine indicating .vlieels are iiioiiiited. and tlie manually operated keyboard for controlling tile actiiating iiieclianisin ot tlie indicating ivlieels, are

ne, Grills C iii tlie corresiieli T Y), ivlieeby tlie indici.J tated tliroiigli suitable t c i practically identical to those slioiin in tie a` tf l 'tl nil'i,- dii red lugs 101, ed duplicates or ie uppe edge of with tlie loiver ends of tlie manually operated. lier stenis cooperate.

1 i tlizt tliere is located ivitliin tlie lovver tion ot tlie calculating linie,l diieetlj,v lieneatli tlie manually operated key loard, a liat'i'ery olfI vertically nioialile stops 105, ivliicli resemble 'die Steins ot the manually operated keys, and are t cooperate Witli `lie den i rael bars 100. ti s linieT tliat tlie values ivliicli tliese stops represent, correspond to tliose oit ilie niaiiiiaily operated keys, and progress successively from 1 to 9 troni front to rear, tlie valuation of tlie iiianually operated lreys being clearly slioivn by tlie niinieals ivliicli sucli keys bear, as illustrated in Fig, 1. The staggered arrangement ol tlie lugs 101, tlie lower ends of tlie manually operated keys, and tlio iipper ends oi"- tlie stops 105, is Well slioiin in Fig. 17, and tlie oloject of suoli an arrangeinent is clearly set fortli in niy ornier application. lt will be noted particularly troni Fig. 17, tliat ivliile the various Steins of eaeli bank of lievs 102 is iii the saine plane, tlie adjoining stops 105 are offset laterally Jfroin eacli otlier for a purpose ivliicli will be eirplained presently. However, vvlien any one of the keys 102 is depressed, or anyone oiJ tlie stops 105 elevated, it will perniit the rack 100 tliat is located above it to loe inoved baci; under tlie influence ot its spring4 unt-il said lrey or stop is engaged by the proper lug or said rack, tliereliy to stop the rack, and consequently the indicating wheels, at a point corresponding to tlie value of suoli rey or stop.

The stops 105 (Fig. 7) are guided Within suitable. apertures in tlie upper and lower plates 106 and 10?, respectively, of a traine vvlierein tlie stops are nio vably supported. Tlie plates G and 10T may lie made up of a plu 'ality of sections or strips tliat lieve their forward and rear edges connected by the members 108 and 109, respectively.

Guided between the opposed sides of the otl'set stops 105 of each bank, is a stop bar 110 (Fig. 7 that is guided within the mem bers 108 and 109. Each of these bars carries a plurality of stop pins 111 for copthe notch will act as a cam to advance the stop bar 110, through the respective pin 111, forwardly against the tension of the spring 1111 that has one of its ends attached to the bar, and its opposite end to the member 109. 115 are springs which connect the stops 105 to the lower plate 107 of the guide frame and tend to depress the stop. When a stop is elevated, it is retained in elevated position against the tension of the spring 115 by the occupancy of its notch 113 by its respective stop pin 111. Attention is called to the fact that the manually operated keys 102 are provided with equivalents 0fthe parts refered to by the reference numerals 110 to 115,' and said corresponding parts of the keys 102 are designated by the same reference numerals, augmented by' the exponent a It will be observed, however, that the notches 112 and 113a of the keys 102 are located in `'the rear edges of such keys. Therefore, when moved to release any of these keys, the stop bars 110a willr necessarily have to movein a direction opposite to that of the stop bars 110 ofy the stops 105.

is a bar which is supported by and between the right hand end plate 15 and lthe intermediate plate 17 (see Figs. 7 2 and 3). Roekel,` arms V121 are mounted upon the bar 120, and the lower ends-of said arms are piwotally connected to the rear ends of the lock bars 110, while the upper ends of said arms are similarily connected to the corresponding ends of the upper stop bars 1102. Therefore, a rearward movement of any of the stop bars 1101'is transmitted to the lower corresponding stop bars and converted into a. forward movement of the latter.

Release key.

(Parts 125 to 141.)

cured to it, an arm 129, the free end ofl tive springs.

which is adapted to be engaged and depiessed by a lug 130 that projects rearwardly and then laterally from the stem 131 of the release key 132. The stem of the release key is guided within suitable apertures formed in the top plate of the machine, and in the plate 133 that is spaced below and supported from the aforesaid plate by end plates 134. A spring 135 tends to elevate said key. From the foregoing, it will be seen that, upon the depression of the release key, the shaft 127 will be oscillated to cause its fin 126 to move rearwardly and slide all of the stop bars 110L1 in a corresponding direction, to remove their stop pins 111a from the not-ches of the stems of the keys 102, and should there be any keys that are depressed within any of the banks of the key board, such operation will release said keys and permit them to return to their normal position under the influence of their respec- Upon the rearward movement of the stop bars 1103, the lower stop bars 110 will be moved forwardly through the intervention of the rocker arms 121, and release any of the stops 105 which may have been locked in elevated position by the stop pins 111.

Splined to the shaft 127, between the intermediate lplate 17 and the arm 129, is the sleeved hub 138 of an arm 139 (Figs. fl and 23) which extends down alongside the casing of the main .clutch 80 in the path of a pin 140 carried thereby. A compression spring 111 upon the shaft 127 and confined between the hub of the arm 139 and that of the arm 129, tends to retain said arm in the path of the pin 140. Therefore, under normal conditions, upon each rotation of the clutch 80 the shaft 127 will be oscillated to release any of the keys 102 or stops 105 that may 'have been respectively depressed or elevated. From` the foregoing it will be seen that both manually and mechanically operated means are provided for releasing the keys and Stops.

Repeat key.

(Parts to 158.)

It is found necessary, in some uses of the machine, as in multiplication and division, to repeat the members represented by the depressed keys or elevated stops, and therefore to retain such keys of stops in operative position until the calculation' is finished.

For this purpose there is provided what is termed the repeat key, shown in perspective in Figs. 23 and 27, and designated 145. The stem 146 ofthe repeat key has a projection 117 for cooperation with a pin 11S that extends from the side of a rock shaft 1-19, supported on brackets 150, from the intermediate plate 17. The rear end of the shaft 119 has secured to it a fork 151 which say 

